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Finding the Fourth Proportional to 18,547.97, 25,607.87 and 12,880.90

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Solution

The fourth proportional to 18,547.97, 25,607.87 and 12,880.90 is: 17,783.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,547.97 : 25,607.87 = 12,880.90 : x
  2. Step 2: Convert to fraction form
    18,547.97/25,607.87 = 12,880.90/x
  3. Step 3: Cross multiply
    18,547.97x = 25,607.87 × 12,880.90
  4. Step 4: Simplify right side
    18,547.97x = 329,852,380.87
  5. Step 5: Solve for x
    x = 329,852,380.87/18,547.97
  6. Step 6: Final answer
    x = 17,783.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.